How would this be a witch hunt? The third definition from https://en.wiktionary.org/wiki/witch-hunt is "A public smear-campaign against an individual" which seems to better describe the actions of https://www.reddit.com/user/aoiyama. One could try to be pedantic about the second definition, "An attempt to find and publicly punish a group of people perceived as a threat, usually on ideological or political grounds.", but if you read the posts at the reddit link and the Mozilla Community Participation Guidelines at https://www.mozilla.org/en-US/about/governance/policies/part..., even if you don't agree with the Mozilla ideology, the aoiyama one is clearly incompatible with the Mozilla one.

If the only course of action is to say "Oh no! They used a throwaway account, so there's nothing we can do about the toxic environment posts like this create for members of our community!" that doesn't bode well for having a non-toxic environment. And since I do need to disclaim that I am a MoCo employee (but 100% speaking for myself alone), I should also mention that you will find in that list of posts a link to https://www.reddit.com/r/MensRights/comments/35u1yp/an_email... where the contents of a Mozilla Corporation internal-mailing list post were reposted. So even if one wanted to write this off as just a random internet troll, the situation is that there is either a MoCo employee intentionally harassing another MoCo employee and Mozillian or a MoCo employee passing information to someone doing the same thing.

I do want to be clear that I am not attributing these hypotheticals to your one-sentence reply. But I also want to be clear that we can't write off this type of toxic behaviour as acceptable because of the risk of being perceived as engaging in witch hunts/star chambers/other hyperbolic misapplications of known-bad-terms.